can the input be applied before the V+ in analog switch? - sci.electronics.basics

Message from discussion can the input be applied before the V+ in analog switch?

tempus fugit

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More options Oct 22 2006, 11:10 pm

Newsgroups: sci.electronics.basics

From: "tempus fugit" <tocc...@no.spam.ciaccess.com>

Date: Sun, 22 Oct 2006 11:10:11 -0400

Local: Sun, Oct 22 2006 11:10 pm

Subject: can the input be applied before the V+ in analog switch?

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Hi;

Still working on the analog switch issue here. I'm thinking of using a
MAX4661 to replace a relay in a switching unit. The relay switches 15v from
float to ground (at 0.15mA). I've been reading the data sheet:

http://datasheets.maxim-ic.com/en/ds/MAX4661-MAX4663.pdf

and on p.7 it talks about power supply sequencing. I'm new to these devices,
so I just want to make sure I understand what they mean. In my application,
it is very likely that the 15v that I need to switch will hit the COM or NC
before the device is powered up. Is this the situation they are advising be
avoided? If so, why would this potentially damage the device?

Thanks

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